The 2.16GHz C2D macbook (mid 2007 release) has a max ram capacity of 3.3GB RAM. But apple advise on only putting in a total of 2GB. Would there be any problems associated with putting 4GB in? I know I wouldn't have access to the remaining 0.7GB, but is there any other things that could happen/have happened for people who've tried this? I think it is a better option for me to buy 4GB because if I upgrade my mac in the near future I'll have 4gigs to play with. cheers, b.